Information technology -- Fibre Distributed Data Interface (FDDI) -- Part 25: Abstract test suite for FDDI -- Station Management Conformance Testing (SMT-ATS)
This part of ISO/IEC 9314 contains the Abstract Test Suites for the Fiber Distributed Data Interface (FDDI) token ring Station Management (SMT) layer protocol. The SMT Protocol is extensive and very complex. In the development process, the protocol was broken into six separate areas. Those areas dealt with Physical Connection Management (PCM), Entity Coordination Management (ECM) Ring Management (RMT), Configuration Management (CMT), Frame Based Management (FBM) and Management Information Base (MIB). This SMT ATS is divided along the same boundaries, with the exception that PCM and ECM are combined. Those two concepts are tested together. The formal description language used for Abstract Test Suite (ATS) development is Tree and Tabular Combined Notational (TTCN) and is defined in ISO 9646Framework. TTCN is intended for higher layer protocol testing and requires the use of discreet Protocol Data Units (PDUs). The TTCN notation is used in the test cases for RMT, FBM and MIB. It cannot be used for PCM, ECM and CFM. These three protocols use line states as the method of conveying information. The TTCN (P) is similar in structure to TTCN but changes the paradigm from PDUs to line states. A description of the concept of TTCN (P) can be found in the beginning of section 6, PCM.